I belong to an agency who send shift details out by text to approx. 300 people.
My surname begins with the letter "L", my first name with the letter "E" and my mobile number starts "079...."

I do not know anything about the text phone (i.e: network or phone model) but I own an android 5.1 THL (Technology Happy Life) phone. My network is 3.

I was sitting with someone else with my agency and they recieved the shift text 30 mins before me (they were with vodaphone and had the first name-surname initials M-A. There mobile number was "077....."

When we checked previous texts, they always receieved then 10-30 mins before me.

As a result of this I never get any work as the shifts are always staffed by the time I get the text.

Is this issue on my side (e.g: phone model / network) or the agencies side?
Is there anything I can do to get more work? They only give out shifts by text (I cannot call in and book).